Rina Kristanti และ Sura Pattanakiat. (2011) Assessment and development scheme of coal mining reclamation in East Kalimantan, Indonesia. Mahidol University:ม.ป.ท.Rina Kristanti และ Sura Pattanakiat. 2011. Assessment and development scheme of coal mining reclamation in East Kalimantan, Indonesia. ม.ป.ท.:Mahidol University;Rina Kristanti และ Sura Pattanakiat. Assessment and development scheme of coal mining reclamation in East Kalimantan, Indonesia. ม.ป.ท.:Mahidol University, 2011. Print.